contaminate
verb (used with object)
to make impure or unsuitable by contact or mixture with something unclean, bad, etc..
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
And what is more, I have been contaminating Dixie!
From The Lady of the Decoration by Frances Little